The Dimer Model for k-phase Organic Superconductors
Superconductivity
2024-11-26 v1
Abstract
We prove that the upper electronic bands of k-phase BEDT-TTF salts are adequately modeled by an half-filled tight-binding lattice with one site per cell. The band parameters are derived from recent ab-initio calculations, getting a very simple but extremely accurate one-electron picture. This picture allows us to solve the BCS gap equation adopting a real-space pairing potential. Comparison of the calculated superconducting properties with the experimental data points to isotropic s_0-pairing. Residual many-body or phonon-mediated interactions offer a plausible explanation of the large variety of physical properties observed in k-phase BEDT-TTF salts.
Cite
@article{arxiv.cond-mat/9706010,
title = {The Dimer Model for k-phase Organic Superconductors},
author = {G. Visentini and A. Painelli and A. Girlando and A. Fortunelli},
journal= {arXiv preprint arXiv:cond-mat/9706010},
year = {2024}
}
Comments
8 pages, 6 PostScript figures, uses RevTeX